【作者】 祁玉平； 胡科毅； Nicholas J.Hogancamp；

【Author】 QI Yuping;HU Keyi;HOGANCAMP Nicholas J.;State Key Laboratory of Palaeobiology and Stratigraphy,Nanjing Institute of Geology and Palaeontology,Chinese Academy of Sciences(CAS);Centre for Research and Education on Biological Evolution and Environment,Nanjing University;Hess Corporation;

【机构】 State Key Laboratory of Palaeobiology and Stratigraphy,Nanjing Institute of Geology and Palaeontology,Chinese Academy of Sciences(CAS)； Centre for Research and Education on Biological Evolution and Environment,Nanjing University； Hess Corporation；

【摘要】 The conodont assemblage of the Bashkirian-Moscovian boundary interval from the Naqing section,South China,was studied in detail and a landmark-based morphometrics analysis was developed to study morphological change in Diplognathodus across the Bashkirian-Moscovian boundary.This analysis helped recognize a distinct new species,D.benderi n.sp.,which represents the evolutionary ancestor of D.ellesmerensis.The potential of using the FAD of D.ellesmerensis as the Bashkirian-Moscovian boundary marker is reevaluated via correlation of conodonts and other fossil groups between different palaeogeographic basins.The FAD of D.ellesmerensis from within the proposed D.benderi-D.ellesmerensis lineage,is a great boundary marker to recognize the global Bashkirian-Moscovian boundary because of its global distribution,the presence of supplementary marker species at similar stratigraphic levels,and the close stratigraphic proximity of the FAD to the traditional Bashkirian-Moscovian boundary,thus largely preserving the original definition of the lower boundary of the Moscovian Stage.更多还原

【Abstract】 The conodont assemblage of the Bashkirian-Moscovian boundary interval from the Naqing section,South China,was studied in detail and a landmark-based morphometrics analysis was developed to study morphological change in Diplognathodus across the Bashkirian-Moscovian boundary.This analysis helped recognize a distinct new species,D.benderi n.sp.,which represents the evolutionary ancestor of D.ellesmerensis.The potential of using the FAD of D.ellesmerensis as the Bashkirian-Moscovian boundary marker is reevaluated via correlation of conodonts and other fossil groups between different palaeogeographic basins.The FAD of D.ellesmerensis from within the proposed D.benderi-D.ellesmerensis lineage,is a great boundary marker to recognize the global Bashkirian-Moscovian boundary because of its global distribution,the presence of supplementary marker species at similar stratigraphic levels,and the close stratigraphic proximity of the FAD to the traditional Bashkirian-Moscovian boundary,thus largely preserving the original definition of the lower boundary of the Moscovian Stage.更多还原